Actually, it was Derby Night last night. It turned out to be a fun evening - especially for all the boys that finally got to race their pinewood derby cars!
So the boys definitely worked on their cars, but so did Ben and even myself a bit. Next year I think we'll let/make the boys do the majority of the work. The boys did sand their cars, painted them (though not the more detailed paint jobs), sanded all their axels, and maybe a few other little things.
Here they are working on spinning their wheels (we had just put in the graphite) during the Olympic's Closing Ceremony:
I found some cute trophies on Pinterest and so I decided to make some, too. I ended up making 6 - there were 2 packs racing and so the top 3 finishers from each pack got a trophy.